2Z5L

The first ketoreductase of the tylosin PKS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.259 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A tylosin ketoreductase reveals how chirality is determined in polyketides

Keatinge-Clay, A.T.

(2007) Chem.Biol. 14: 898-908

  • DOI: 10.1016/j.chembiol.2007.07.009

  • PubMed Abstract: 
  • Because it controls the majority of polyketide stereocenters, the ketoreductase (KR) is a central target in engineering polyketide synthases (PKSs). To elucidate the mechanisms of stereocontrol, the structure of KR from the first module of the tylosi ...

    Because it controls the majority of polyketide stereocenters, the ketoreductase (KR) is a central target in engineering polyketide synthases (PKSs). To elucidate the mechanisms of stereocontrol, the structure of KR from the first module of the tylosin PKS was determined. A comparison with a recently solved erythromycin KR that operates on the same substrate explains why their products have opposite alpha-substituent chiralities. The structure reveals how polyketides are guided into the active site by key residues in different KR types. There are four types of reductase-competent KRs, each capable of fixing a unique combination of alpha-substituent and beta-hydroxyl group chiralities, as well as two types of reductase-incompetent KRs that control alpha-substituent chirality alone. A protocol to assign how a module will enforce substituent chirality based on its sequence is presented.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158, USA. adriankc@msg.ucsf.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tylactone synthase starter module and modules 1 & 2
A
511Streptomyces fradiaeMutation(s): 0 
Gene Names: tylG
Find proteins for O33954 (Streptomyces fradiae)
Go to UniProtKB:  O33954
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.259 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 66.180α = 90.00
b = 49.810β = 109.20
c = 68.810γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data scaling
ADSCdata collection
HKL-2000data reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-08-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2014-11-12
    Type: Structure summary